Center the "stencil" doily - a fix with a small piece of double sided tape.
I use the tape so the spray paint doesn't blow the stencil away, also if you turn the larger doily to apply a second coat the stencil will not shift.

Remove the stencil after a few minutes - and get ready to spray your next doily!
I have found the metallic paints dry faster then the "regular colors" and are easier to get an
"even" coat.

Last - add that special something to the center......or leave the stencil off, and have a classic solid place mat.